The intensity of final energy consumption as well as sectoral intensities in Slovenia have decreased over the period 2005-2022. Most in industry, least in transport. Comparison with the EU-27 shows that Slovenia is worse than the EU-27 average, but the gap has almost halved over the period 2005-2021, with contribution of all sectors except transport.

Total revenues from taxes/charges from road, rail and inland water transport in the EU28 amounted to EUR 370 billion in 2016. This is approximately 2.5% of EU28 GDP in 2016. Aviation and maritime revenues are calculated only for a set of selected airports and ports, so it is not possible to determine the share of these revenues in total aviation and maritime tax/charges revenues of transport in the EU28.

The intensity of SO2, NOx and CO2 emissions from electricity and heat production in public thermal power plants in 2021 was significantly lower than in 2005, with SO2 emissions intensity 94% lower, NOx  71% lower and CO2 28% lower. Compared to the EU-27 average, the intensity of CO2 emissions in Slovenia in 2021 was higher, NOx emissions slightly lower and SO2 emissions significantly lower.

During the period from 2012 to 2022, taxes on energy sources in Slovenia fluctuated, generally decreasing except for electricity for industrial consumers, where they increased due to levies. Between 2020 and 2022, temporary measures were introduced to reduce taxes on certain energy sources due to the COVID-19 pandemic and the war in Ukraine. Compared to the EU-27, the taxation of electricity and natural gas for households in Slovenia was lower, while it was higher for industrial consumers; diesel fuel taxation was higher, while gasoline taxation was lower.

Over the period 1990-2022, the amount of spent nuclear fuel, the only high-level radioactive waste, increased at an average rate of 5% per year. In the absence of a satisfactory permanent storage solution, there are concerns about the accumulation of this waste.